贵州省典型农业区土壤重金属污染及在蔬菜中的富集研究

The Research of Soil Heavy Metal Pollution and Concentrates in the Vegetables in Typical Agricultural Region of Guizhou Province

选择贵州省遵义县4个镇典型农业区,研究重金属含量和污染特征以及在蔬菜中的富集作用。结果表明,由于贵州省重金属本底值普遍较高,遵义县虾子镇、永乐镇、新舟镇和喇叭镇土壤Cd、Hg、As均有超标,Cd的超标率分别为64.3%、31.3%2、3.5%和6.3%,Hg的超标率分别为37.5%、11.8%、12.5%和28.6%,As的超标率分别为6.3%、23.5%、31.3%和28.6%;从蔬菜对重金属的富集作用来看,辣椒、西红柿对于Cd有较强的富集作用,豇豆对As的富集系数略高于其它蔬菜,黄瓜、豇豆对Hg的富集强于对其它重金属元素的富集。

Chooses 4 town typical agricultural region of ZunYi County GuiZhou Province, studies on the heavy metal content and the pollution characteristic as well as concentrate function in vegetables. The result indicated that, because of the heavy metal background value is generally high in Guizhou Province, the soil Cd, Hg, As have exceeding the allowed figure in XiaZi town, YongLe town, XinZhou town and LaBa town Zunyi County, the Cd exceeding the allowed figure rate respectively are 64.3% , 31.3% , 23.5% and 6.3% , the Hg exceeding the allowed figure rate respectively is 37.5%, 11.8%, 12.5% and the 28.6%, as exceeding the allowed figure rate respectively is 6.3%, 23.5%, 31.3% and 28.6% . Seen from the heavy metal concentrate function from the vegetables , the hot pepper, the tomato have strongly concentrate function regarding heavy metal Cd, the cowpea concentrate as higher than other vegetables slightly, the cucumber, the eowpea concentrate Hg strongly than other heavy metal element.